Viagra drug interactions

Categories: Viagra Canada

A prescription medication Viagra has certain drug interactions. It should not be used with other PDE5 inhibitors such as tadalafil (Cialis), vardenafil (Levitra and Staxyn) and avanafil (Stendra) or other alternatives.

Viagra is absolutely contraindicated for men who use any nitrate drug for chest pain or heart problems. Dangerous interaction may occur if Viagra is used with nitrates.

Other less serious, still clinically significant Viagra interactions may happen with the following medications:

  • bosentan (Tracleer);
  • cimetidine (Tagamet, Tagamet HB);
  • conivaptan (Vaprisol);
  • imatinib (Gleevec);
  • isoniazid;
  • rifampin (Rifadin, Rimactane, Rifater, Rifamate);
  • nefazodone;
  • clarithromycin (Biaxin), dalfopristin/quinupristin (Synercid), erythromycin (E.E.S., EryPed, Ery-Tab, Erythrocin, Pediazole) or telithromycin (Ketek);
  • itraconazole (Sporanox), ketoconazole (Nizoral), miconazole (Oravig), or voriconazole (Vfend);
  • diltiazem (Cardizem, Dilacor, Tiazac), doxazosin (Cardura), nicardipine (Cardene), quinidine (Quin-G), or verapamil (Calan, Covera, Isoptin, Verelan);
  • atazanavir (Reyataz), delavirdine (Rescriptor), fosamprenavir (Lexiva), indinavir (Crixivan), nelfinavir (Viracept), saquinavir (Invirase), or ritonavir (Norvir, Kaletra).

This list of drugs with potential to interact with Viagra is not complete, for full information about possible drug interactions ask your doctor. Never start using any medication if you take any prescription or over-the-counter medication without first consulting a doctor.

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